Paper container and method of making the same



R. OLIVER Aug. 25, 1936.

PAPER CONTAINER AND METHOD OF MAKING THE SAME Filed Oct. 28, 1955 2 Sheets-Sheet 1 a Qlttumrgs.

Ruth Oliver mm Aug. 25, 1936.. R. OLIVER I PAPER CONTAINER AND METHOD OF MAKING THE SAME .Filed Oct. 28, '1953 2 Sheets-SheetQ Eltturmgs.

Patented Aug. 25 1936 UNITED STATES PATENT OFFICE PAPER CONTAINER AND METHOD OF MAKING THE SALE This invention relates to paper containers such as bottles and the like and has reference not only to the particular construction of the container but also to a new and novel method 5 whereby the same can be produced. l

. In structures of the class referred to it is preferred to provide the containers with neck rings so shaped as to permit use of the usual h closures. These rings, formed entirely of paper,

'1 have been placed outside of the neck portions of the containers. It has been found in practice, however, that' in order to produce a container of requisite strength, it is advantageous I 'to insert the neck ring into the neck portion 15 of-the body Where it not only provides an efiicient seat for a disk or other closure, but it also forms a stiffening reinforcement for the neck. Furthermore by so locating the neck ring, the neck portion of the container can be contracted to proper size for engagement with the ring so that it is unnecessary to expand any part of the material of the container. Such expansion is objectionable because it tends to stretch the ma.- terial and weaken or rupture it.

Q An object of the present invention is to provide an all paper container with the neck ring located inside of the neck portion of the bottie, the parts being assembled and shaped by a novel method whereby danger of injuring the 0 material through stretching is eliminated entirely.

* A further object is to provide a tubular container the body and neck ring portions of which can be formed of tubular structures produced as 35 disclosed, for example, in Patent 1,877,144 issued to me and George R. Penn jointly under date of September 13, 1932.

A still further object is to provide an all paper container capable of rapid production, 40 cheap to manufacture, and which can withstand all strains to which ordinary milk botties or similar containers are subjected in handling.

With the foregoing and other objects in view 45 which will appear as the description proceeds, the invention consists of certain novel details of construction and combinations of parts and in certain steps of the method hereinafter more fully described and pointed out in the claims, it 50 being understood that changes maybe made in the construction and arrangement of parts and in the disclosed method without departing from the spirit of the invention as claimed.

In the accompanying drawings the preferred 55 forms of the invention have been shown.

In said drawings:

Figure 1 is a longitudinal section through the blank from which the body and neck portions of an all-paper bottle are to be produced, the same being shown partly shaped.

Figure 2 is a similar view through the upper portion of the blank with the neck ring in position and the upper end of the blank curled inwardly.

Figure 3 is a longitudinal section through the lower portion of the blank showing the bottom member in position, said member being partly in elevation and partly in section.

Figure 4 is a vertical section through the parts shown in Figure 3 and showing the second step in the formation of the bottom seal.

Figure 5 is an enlarged section through a portion of the bottom and showing the final step in the formation of the seal.

Figure 6 is a section through the completed container.

' the body and neck portions and another length f tubular material to form the neck ring. As. heretofore stated these tubular portions can be produced by the method disclosed in the patent referred to and while they are preferably formed of several layers of paper produced by wrapping, the members can, obviously, be formed of single thicknesses or might even be of molded paper. In every case the tubular body portion II is formed of sufficient length to provide the necessary material for the body and neck portions. The tubular member l is placed on a mandrel or other suitable shaping core and subjected to compression thereby to provide a fluted tapered shoulder portion 2, a cylindrical lower neck portion 3; a cylindrical upper neck portion 4 and 'an intermediate offset or shoulder t.

The neck ring B which is formed entirely of paper is shaped by pressure to provide an end seat l and an intermediate tapered shoulder t. It is preferred to form the neck ring with a downwardly flared opening 9, it being understood that the shaping of this neck ring can be efiected by pressure either prior to its insertion into the neck portion of the body blank or simultaneously with the shaping of said neck portion, Whether or not the neck ring is produced in either manner stated, a tight fit will be provided between the neck portions 3 and 4 and the shoulder 5 of the body blank and the corresponding portions of the neck ring. The parts can be joined with an adhesive if preferred. This assembly has been illustrated in Figure 2. r

It is preferred to curl inwardly the upper edge of the neck portion 4 to provide an interior bead l and following the assembly and proper shaping of the two blanks this beaded portion of the neck can be pressed, downwardly toward the seat I where it will tightly hug the wall of the seat as shown in Figure 6. Thus the bead and seat will cooperate to provide an annular channel II for receiving the marginal portion of a disk or other closure.

In providing a bottom seal for the container it is intended to use a conical bottom disk l2 formed of one or more layers of paper, said disk being provided with a depending marginal flange ii. The outer surface of this flange can be roughened and the corresponding surface of the inner side of blank I can likewise be roughened. Thus when the two roughened surfaces are brought into proximity with a suitable adhesive between them, they will be more tightly anchored together than would be possible should the surfaces be smooth. The bottom end of blank I is extended below flange I3 so that it can be folded upwardly into the space surrounded by the flange and bear against the inner surface of the flange and against the adjacent portion of disk l2. This has been shown in Figure 4. Thereafter the three thicknesses of material thus provided are again folded inwardly and upwardly against disk I! to provide a broad annular bearing therefor as indicated at H in Figure 5. Consequently the bottom is not only securely locked and sealed to the blank 1 but a broad stiffening supporting rib is thus produced as will be obvious by referring to Figures 5 and 6. Instead of forming the bottom as heretofore explained a deep score or channel l5 can be pressed into the inner surface of blank I as shown in Figure 7. The bottom disk It can have a roughened edge II. This disk can be made slightly oversize so that when it is pressed into blank i the edge II will become seated in channel I5.

The bottom end portion of the tubular blank 3 can be pressed inwardly to form a fold ill, the edge bearing against and supporting the bottom disk as shown in Figure 7. If desired a double fold could be made so as ,to produce a broader stiffening and supporting rib substantially as shown in Figure 5. In any event the roughened margin of the bottom disk will become anchored in a suitable adhesive and be securely tied to the blank l8.

It is to be understood that although a bottlelike container with a fluted or corrugated shoulder portion has been illustrated, containers of other configurations can be produced. The

pressing operation occurring during the contraction of the blank I or l8 can be utilized for effecting other shapes than that disclosed. For example a smooth shoulder'portion could be formed instead of the fluted shoulder portion and obviously the configuration of the neck portions can be changed. The essential features of the invention include the location of a neck ring within the neck portion of the main blank,

the contraction of the main blank to proper proportions for snug engagement with the neck ring, and the particular inter-locking sealing connection between the bottom .disk and the main blank, utilizing roughened surfaces.

Pressure is of course utilized not only for contracting the main blank but also for properly shaping the materials forming the mouth of the bottle and, therefore, the finished container will present a smooth and attractive appearance.

It is intended to provide the interior surfaces of the container with a protective coating and if desired this coating can be applied for sanitary reasons immediately prior to the filling of the container.

By flaring the opening 9 in the neck ring, the inner surface of said ring can be made to constitute substantially a continuation of the inner surface of the shoulder portion of the container. Thus the container is kept free from interior shoulders tending to trap liquids or other materials within the container.

What is claimed is:

1. The method of producing a paper container which includes the step of contracting a tubular body blank to produce a tapered shoulder portion, a cylindrical upper neck portion providing a mouth and a reduced cylindrical lower neck portion and thereafter securing a neck ring within both of said neck portions to reinforce the neck from the shoulder to the mouth.

2. An all-paper container comprising a tubular body having a contracted end portion providing a tapered shoulder portion, an upper neck portion having a mouth, and a reduced lower neck portion, and a molded neck ring fitted snugly within both of said neck portions and constituting a reinforcement for the neck from the shoulder to the mouth.

3. An all-paper container comprising a tubular body having a contracted end portion providing a tapered shoulder portion, an upper neck portion having an inturned end providing a mouth and a reduced lower neck portion, and a molded paper neck ring held between the reduced lower neck portion and the inturned end and fitted snugly within and reinforcing both neck portions.

RUTH OLIVER. 

